House Path Blocked

Dear sir, Greetings from Kolkata West Bengal, I am Rahul Ghosh, living in Kolkata West Bengal. We have constructed a house with 720sqft in West Bengal near hatiara. The land is in my fathers name. Our neighbours have blocked our house path by temporary material like toilet chembur which can be conquered, it is our 3x3 6 feet common wide passage, but because they're using another path which is in their backside they have blocked our passage which is their passage also. First they told us because they're using their backside passage they won't leave their front side 3ft which is the common passage for both of us, then they told us that there is no common passage in their property's site plan which is a lie and when we asked them to show their site plan they are making excuses and not showing their site plan. There is a 3x3 6ft common passage in our documents and we know it is in theirs also. Our area committee and our area club are not supporting nor helping us because we are newbies in this area, we are living in this area over four years and our neighbours are here for almost 11/12years this is why no one is helping us. Can you please advice me regarding this? Thank you